1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310932b2748185ad55b7bd84b9cc3c64cbc398f5e8b26d8b416f1a15da6d1032. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be1446ca-16fd-43e5-87c7-90b90bf7efa7.json and https://artists.proofprofile.net/proofs/artist/be1446ca-16fd-43e5-87c7-90b90bf7efa7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The King's Face, Pt.4 (Original Soundtrack)
The King′s Face, Pt. 4 (Original Soundtrack)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb608ed8babac82489ae8e770fd6cc723de147832394c991a367451da53b18969. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB921907695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2780e6a1644311b7a488265b300bfcc4b585842ccb898068d13721011f270a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB921907696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc90adba73ed94bfe36e1d7ef32e8b9a97c78e4cc67a6413c93bf6934034b37. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB921907709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e6f115f5e9b626a099bbef9ef7ce113eabe83be5071c7b39fe4ec964465dbf. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB921907714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9047c6c8574bdec7e79fd70527ad735849077533422a82008d27739255b994d6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB921907716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d3368894d92b4b3baa76283f9d3e65810e594d173ca355ff47456f81dbf036. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08e2bb01de9e45ff9060aa9df3d626f096ffb789668755d24a6da8e2d965978. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc419caa68be68cf8837912d7f193a8d6a9b00f0c158eaec7d104e8ec6a84da43. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36577b2cd30547831e62207398826e46bc5868d536e0b4a0eb8cf5b6906f1cab. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74878c66ba5ab491e66cc82dc6e3d834ab78c55673ae8b4f6e19ca488c94847a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d09cc618f4763f4cd839889ff2f19cccc0d4ee921b679748cf896c74854035. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6ca67f7c6739ed6cd5bb60fa64857a220cd46dc1246d86619449ce8e85a293. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf37511b3f06843bcfc784b7b2c4de089f68d92764d0ac8beae0a6131c38adfc. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67734c9fc65e1edeb9d60322dc33f8e72b46877291ecf868f47f4a009eafb120. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce698555f59d3048895b04f3abc58e43853eafb1d73f20414fe6212b11fe8fd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e9c987feaf8a942ab705b864579b9a93c26b23205aa8383656a2b369c05e73. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12621c43751960da894fc829c423a0b1f64aacba9f589d695244ec9a59579a8. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e284ada25a45201e89570d0d9b3ad7c7a636e51e8a4b66d2757cf68b5b98458. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72691ee54f61c293bc3e7715f14c148e13d28096da270dbed96211bb7420d7a3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe263b0faed724a733a3c56f89f45ee639f32f6767575fc3f4d6ddd11afb3bdee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fd69f9821d4000a08c2879c040a1456f831c6ec1d933edec9f0b3a7ec89df7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d91bcbf500accc8a8126358fc16f84655e84407a51f5e31bc37cc561e4830bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df9a837bdd1fb40c0903eb2b0c034edf60a34aec945e45ed7fdcb25b3c581b3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f69549a993215c4a0001d3ca171cf49cad2b51fa06f08a8b16c4350d42b6c3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ab9b9e487409f504f5e030749cfd9da2a0647a61b9730c8bb501db2f6dfeb. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381205179.